title: Comparison between TG-51 and TRS-398: electron contamination effect on photon beam-quality specification.
mesh_terms: D004583:Electrons; D008280:Magnetics; D010315:Particle Accelerators / Q000592:standards*; D019047:Phantoms, Imaging; D017785:Photons; D011874:Radiometry; D011880:Radiotherapy Planning, Computer-Assisted; D011882:Radiotherapy, High-Energy / Q000592:standards*; D013997:Time Factors